SUBSTRAT 2-Component Repair Adhesive / Casting Resin SUBSTRAT 2-component repair adhesive and casting resin based on polyester resin enables simple yet highly professional screed crack repairs in combination with SUBSTRAT screed clamps – clean the crack, pour in the adhesive, insert the clamps. Suitable for indoor and outdoor use, and for bonding nail strips, metal profiles, natural and artificial stone, as well as filling drill holes or voids under tiles. Included in the package: 10 wave connectors and 30 g hardener.